@SWP, well, I included the others since you asked for super star destroyers.
They all are. Just different classes. I forgot the Vengeance Class though, which is only one known ship from the Jedi Knight game.

Anyway, some interdictors are star destroyers, like the Dominator-Class star destroyer (1.6 km long), while others are much smaller vessels which has been given the the same wedge shape as star destroyers, like the Immobiliser-418.

I forgot to add my question yesterday (sorry about that ), so I shall give it instead of Cap.

Q: Which are the 2 highest ranks posible to achieve in the Imperial military, and name a few that has been of that rank?